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The ultrastructure of the daughter sporocyst of Cercaria bucephalopsis haimaena Lacaze-Duthiers, 1854 (Digenea: Bucephalidae) from the edible cockle, Cardium edule L.

Published online by Cambridge University Press:  06 April 2009

B. L. James ,
E. A. Bowers  and
J. G. Richards
B. L. James
Affiliation:
Department of Zoology, University College, Swansea
E. A. Bowers
Affiliation:
Department of Zoology, University College, Swansea
J. G. Richards
Affiliation:
Department of Zoology, University College, Swansea
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Extract

The body wall of the daughter sporocyst of Cercaria bucephalopsis haimaena Lacaze-Duthiers, 1854, is shown by the electron-microscope to consist of an external syncytial tegument, lying on a basement membrane, and an internal cellular subtegument, which surrounds a body cavity containing developing cercariae.

The syncytial tegument has areas of dense cytoplasm alternating with sparse reticulate cytoplasm. The dense cytoplasm contains nuclei, a few mitochondria and secretory products which probably include a neutral mucopolysaccharide. This may be the precursor of the acid mucopolysaccharide in the sparse reticulate cytoplasm and on the surface of the daughter sporocyst.

Nutrients are probably absorbed through the outer plasma membrane of the tegument, pass through the sparse reticulate cytoplasm in the middle region of the tegument, the inner plasma membrane and basement membrane into the subtegument.

The ultrastructure of the tegument of adult and larval Digenea are compared.

We would like to thank Dr Gwendolen Rees for allowing us to examine the electron-micrographs of Parorchis acanthus. We are also grateful to Professor E. W. Knight-Jones for the provision of excellent working facilities and to the Science Research Council, for a grant to one of us (E.A.B.) which made the work possible.

Type
Research Article
Information
Parasitology , Volume 56 , Issue 4 , November 1966 , pp. 753 - 762
Copyright
Copyright © Cambridge University Press 1966

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References

REFERENCES

Björkman, T. E., Thorsell, W. & Leinert, E. (1963). Studies on the action of some enzymes on the cuticle of Fasciola hepatica L. Experientia 19, 1–5.CrossRefGoogle Scholar
Bowers, E. A. (1965). Studies on some parasites of sea birds and molluscs. Ph.D. Thesis, University College, Swansea.Google Scholar
Brand, Th. von (1952). Chemical Physiology of Endoparasitic animals, 399 pp. New York: Academic Press Inc.Google Scholar
Burton, P. R. (1964). The ultrastructure of the integument of the frog lung-fluke, Haematoloechus medioplexus (Trematoda: Plagiorchiidae). J. Morph. 115, 305–18.CrossRefGoogle ScholarPubMed
Cardell, R. R. (1962). Observations on the ultrastructure of the body of the cercaria of Himasthla quissetensis (Miller & Northup, 1926). Trans. Am. microsc. Soc. 81, 124–31.CrossRefGoogle Scholar
Cardell, R. R. & Philpott, D. N. (1960). The ultrastructure of the tail of the cercaria of Himasthla quissetensis (Miller & Northup, 1926). Trans. Am. microsc. Soc. 79, 442–50.CrossRefGoogle Scholar
Cheng, T. C. (1963). Biochemical requirements of larval trematodes. Ann. N.Y. Acad. Sci. 113, 289–321.CrossRefGoogle ScholarPubMed
Cheng, T. C. & Sanders, B. G. (1962). Internal defense mechanisms in molluscs and an electrophoretic analysis of a naturally occurring serum hemagglutinin in Viviparus maleatus (Reeve). Proc. Pa. Acad. Sci. 36, 72–83.Google Scholar
Cheng, T. C. & Snyder, R. W. Jr (1962 a). Studies on host-parasite relationships between larval trematodes and their hosts. I. A review. II. The utilisation of the host's glycogen by the intramolluscan larvae of Glypthelmins pennsylvaniensis Cheng, and related phenomena. Trans. Am. microsc. Soc. 81, 209–28.CrossRefGoogle Scholar
Cheng, T. C. & Snyder, R. W. Jr (1962 b). Studies on host-parasite relationships between larval trematodes and their hosts. III. Certain aspects of lipid metabolism in Helisoma trivolvis (Say) infected with the larvae of Glypthelmins pennsylvaniensis Cheng and related phenomena. Trans. Am. microsc. Soc. 81, 327–31.CrossRefGoogle Scholar
Isseroff, H. (1964). Fine structure of the eyespot in the miracidium of Philophthalmus megalurus (Cort, 1914). J. Parasit. 50, 549–54.CrossRefGoogle ScholarPubMed
James, B. L. (1964 a). The life cycle of Parvatrema homoeotecnum sp.nov. (Trematoda: Digenea) and a review of the family Gymnophallidae Morozov, 1955. Parasitology 54, 1–41.CrossRefGoogle Scholar
James, B. L. (1964 b). Studies on some larval trematodes from littoral molluscs. Ph.D. Thesis, University College of Wales, Aberystwyth.Google Scholar
James, B. L. (1965). The effects of parasitism by larval Digenea on the digestive gland of the intertidal prosobranch, Littorina saxatilis (Olivi) subsp. tenebrosa (Montagu). Parasitology 55, 93–115.CrossRefGoogle Scholar
James, B. L. & Bowers, E. A. (1967). The germ cell cycle and method of reproduction in the daughter sporocysts of Cercaria bucephalopsis haimaena Lacaze-Duthiers, 1854 (Bucephalidae) and Cercaria dichotoma Lebour, 1911 (Gymnophallidae), together with a review of the interpretative theories advanced to explain the life cycle of the Digenea. Parasitology (In the Press.)Google Scholar
James, B. L. & Cable, R. M. (1965). Germinal sacs of Parvatrema homoeotecnum James, 1964 (Trematoda: Digenea) from the haemocoel of the marine gastropod, Littorina saxatilis (Olivi). J. Parasit. 51, 58.Google Scholar
Kummel, G. (1960). Die Feinstruktur des Pigmentbecherocells bei Miracidien von Fasciola hepatica L. Zool. Bietr. 5, 345–54.Google Scholar
Monné, L. (1959). On the external cuticles of various helminths and their role in the host–parasite relationship. A histochemical study. Ark. Zool. 12, 243–58.Google Scholar
Reynolds, E. S. (1963). The use of lead citrate at high pH as an electron-opaque stain in electron-microscopy. J. Cell Biol. 17, 208–12.CrossRefGoogle ScholarPubMed
Smith, J. C. (1965). Bibliography on the metabolism of endoparasites exclusive of arthropods, 1951–1962. Expl Parasit. 16, 236–90.CrossRefGoogle Scholar
Threadgold, L. T. (1963). The tegument and associated structures of Fasciola hepatica. Q. Jl microsc. Sci. 104, 505–12.Google Scholar